Achieving the goal with less effort so that you can spend more effort on other aspects of the job or on other endeavors is effecient.

Wanting each of your teachers to learn how to use a constantly changing array of 20 different social image sharing services in order to receive work in a format that is more work to process is lazy.

the former. Even some professional editors prefer pen/stylus for some review stages.

You can do this with a pdf with annotations and a touch screen with a pen